CVE-2011-3402

HighActively exploited (CISA KEV)

Description

Unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page, as exploited in the wild in November 2011 by Duqu, aka "TrueType Font Parsing Vulnerability."

SeverityHigh
CVSS8.8
Exploit probability—
ProductMicrosoft Windows
PublishedNov 4, 2011
First seenNov 4, 2011
Added to KEVOct 6, 2025

How to fix

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA due date: Oct 27, 2025

Affected products

ProductAffected versionsFixed in
microsoft windows_7No range specified—
microsoft windows_server_2003No range specified—
microsoft windows_server_2008No range specified—
microsoft windows_vistaNo range specified—
microsoft windows_xpNo range specified—

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